Mercurial > pub > ImplabNet

annotate Implab/Promise.cs @ 7:7ea9363fef6c promises

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
inital progress handling
author cin
date Fri, 01 Nov 2013 16:03:08 +0400
parents dfa21d507bc5
children c82e0dfbb4dd
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
aa367305156b small fixes
cin
parents: 1
diff changeset
1 using System;
aa367305156b small fixes
cin
parents: 1
diff changeset
2 using System.Collections.Generic;
aa367305156b small fixes
cin
parents: 1
diff changeset
3 using System.Linq;
aa367305156b small fixes
cin
parents: 1
diff changeset
4 using System.Reflection;
aa367305156b small fixes
cin
parents: 1
diff changeset
5 using System.Text;
aa367305156b small fixes
cin
parents: 1
diff changeset
6 using System.Diagnostics;
aa367305156b small fixes
cin
parents: 1
diff changeset
7 using System.Threading;
aa367305156b small fixes
cin
parents: 1
diff changeset
8
aa367305156b small fixes
cin
parents: 1
diff changeset
9 namespace Implab {
aa367305156b small fixes
cin
parents: 1
diff changeset
10
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
11 public delegate void ErrorHandler(Exception e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
12
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
13 public delegate void ResultHandler<T>(T result);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
14 public delegate TNew ResultMapper<TSrc, TNew>(TSrc result);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
15 public delegate Promise<TNew> ChainedOperation<TSrc, TNew>(TSrc result);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
16
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
17 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
18 /// Класс для асинхронного получения результатов. Так называемое "обещание".
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
19 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
20 /// <typeparam name="T">Тип получаемого результата</typeparam>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
21 /// <remarks>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
22 /// <para>Сервис при обращении к его методу дает обещаиние о выполнении операции,
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
23 /// клиент получив такое обещание может установить ряд обратных вызово для получения
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
24 /// событий выполнения обещания, тоесть завершения операции и предоставлении результатов.</para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
25 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
26 /// Обещение может быть как выполнено, так и выполнено с ошибкой. Для подписки на
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
27 /// данные события клиент должен использовать методы <c>Then</c>.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
28 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
29 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
30 /// Сервис, в свою очередь, по окончанию выполнения операции (возможно с ошибкой),
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
31 /// использует методы <c>Resolve</c> либо <c>Reject</c> для оповещения клиетна о
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
32 /// выполнении обещания.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
33 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
34 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
35 /// Если сервер успел выполнить обещание еще до того, как клиент на него подписался,
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
36 /// то в момент подписки клиента будут вызваны соответсвующие события в синхронном
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
37 /// режиме и клиент будет оповещен в любом случае. Иначе, обработчики добавляются в
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
38 /// список в порядке подписания и в этом же порядке они будут вызваны при выполнении
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
39 /// обещания.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
40 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
41 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
42 /// Обрабатывая результаты обещания можно преобразовывать результаты либо инициировать
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
43 /// связанные асинхронные операции, которые также возвращают обещания. Для этого следует
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
44 /// использовать соответствующую форму методе <c>Then</c>.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
45 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
46 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
47 /// Также хорошим правилом является то, что <c>Resolve</c> и <c>Reject</c> должен вызывать
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
48 /// только инициатор обещания иначе могут возникнуть противоречия.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
49 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
50 /// </remarks>
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
51 public class Promise<T>: IPromise {
2
aa367305156b small fixes
cin
parents: 1
diff changeset
52
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
53 struct ResultHandlerInfo {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
54 public ResultHandler<T> resultHandler;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
55 public ErrorHandler errorHandler;
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
56 public Action cancelHandler;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
57 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
58
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
59 LinkedList<ResultHandlerInfo> m_handlersChain = new LinkedList<ResultHandlerInfo>();
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
60 PromiseState m_state;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
61 bool m_cancellable;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
62 T m_result;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
63 Exception m_error;
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
64 IPromise m_parent;
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
65 int m_childrenCount;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
66
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
67 public Promise() {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
68 m_cancellable = true;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
69 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
70
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
71 public Promise(IPromise parent, bool cancellable)
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
72 {
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
73 m_cancellable = cancellable;
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
74 m_parent = parent;
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
75 }
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
76
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
77 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
78 /// Событие, возникающее при отмене асинхронной операции.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
79 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
80 /// <description>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
81 /// Как правило используется для оповещения объекта, выполняющего асинхронную операцию, о том, что ее следует отменить.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
82 /// </description>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
83 public event EventHandler Cancelled;
2
aa367305156b small fixes
cin
parents: 1
diff changeset
84
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
85 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
86 /// Выполняет обещание, сообщая об успешном выполнении.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
87 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
88 /// <param name="result">Результат выполнения.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
89 /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
90 public void Resolve(T result) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
91 lock (this) {
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
92 if (m_state == PromiseState.Cancelled)
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
93 return;
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
94 if (m_state != PromiseState.Unresolved)
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
95 throw new InvalidOperationException("The promise is already resolved");
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
96 m_result = result;
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
97 m_state = PromiseState.Resolved;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
98 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
99
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
100 ResultHandlerInfo handler;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
101 while (FetchNextHandler(out handler))
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
102 InvokeHandler(handler);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
103 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
104
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
105 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
106 /// Выполняет обещание, сообщая об ошибке
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
107 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
108 /// <param name="error">Исключение возникшее при выполнении операции</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
109 /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
110 public void Reject(Exception error) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
111 lock (this) {
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
112 if (m_state == PromiseState.Cancelled)
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
113 return;
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
114 if (m_state != PromiseState.Unresolved)
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
115 throw new InvalidOperationException("The promise is already resolved");
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
116 m_error = error;
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
117 m_state = PromiseState.Rejected;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
118 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
119
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
120 ResultHandlerInfo handler;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
121 while (FetchNextHandler(out handler))
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
122 InvokeHandler(handler);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
123 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
124
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
125 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
126 /// Отменяет операцию, если это возможно.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
127 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
128 /// <returns><c>true</c> Операция была отменена, обработчики не будут вызваны.<c>false</c> отмена не возможна, поскольку обещание уже выполнено и обработчики отработали.</returns>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
129 public bool Cancel() {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
130 lock (this) {
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
131 if (m_state == PromiseState.Unresolved && m_cancellable)
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
132 {
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
133 m_state = PromiseState.Cancelled;
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
134 EventHandler temp = Cancelled;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
135
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
136 if (temp != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
137 temp(this, new EventArgs());
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
138
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
139 return true;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
140 } else
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
141 return false;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
142 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
143 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
144
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
145 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
146 /// Добавляет обработчики событий выполнения обещания.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
147 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
148 /// <param name="success">Обработчик успешного выполнения обещания.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
149 /// Данному обработчику будет передан результат выполнения операции.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
150 /// <param name="error">Обработчик ошибки. Данный обработчик получит
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
151 /// исключение возникшее при выполнении операции.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
152 /// <returns>Само обещание</returns>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
153 public Promise<T> Then(ResultHandler<T> success, ErrorHandler error) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
154 if (success == null && error == null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
155 return this;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
156
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
157 var medium = new Promise<T>();
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
158
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
159 var handlerInfo = new ResultHandlerInfo();
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
160
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
161 if (success != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
162 handlerInfo.resultHandler = x => {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
163 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
164 success(x);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
165 medium.Resolve(x);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
166 } catch (Exception e) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
167 medium.Reject(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
168 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
169 };
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
170 else
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
171 handlerInfo.resultHandler = x => medium.Resolve(x);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
172
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
173 if (error != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
174 handlerInfo.errorHandler = x => {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
175 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
176 error(x);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
177 } catch { }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
178 medium.Reject(x);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
179 };
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
180 else
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
181 handlerInfo.errorHandler = x => medium.Reject(x);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
182
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
183 AddHandler(handlerInfo);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
184
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
185 return medium;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
186 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
187
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
188 public Promise<T> Then(ResultHandler<T> success) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
189 return Then(success, null);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
190 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
191
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
192 public Promise<T> Error(ErrorHandler error) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
193 return Then(null, error);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
194 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
195
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
196 public Promise<T> Anyway(Action handler) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
197 if (handler == null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
198 return this;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
199
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
200 var medium = new Promise<T>();
2
aa367305156b small fixes
cin
parents: 1
diff changeset
201
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
202 AddHandler(new ResultHandlerInfo {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
203 resultHandler = x => {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
204 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
205 handler();
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
206 medium.Resolve(x);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
207 } catch (Exception e) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
208 medium.Reject(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
209 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
210 },
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
211 errorHandler = x => {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
212 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
213 handler();
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
214 } catch { }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
215 medium.Reject(x);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
216 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
217 });
2
aa367305156b small fixes
cin
parents: 1
diff changeset
218
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
219 return medium;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
220 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
221
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
222 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
223 /// Позволяет преобразовать результат выполения операции к новому типу.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
224 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
225 /// <typeparam name="TNew">Новый тип результата.</typeparam>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
226 /// <param name="mapper">Преобразование результата к новому типу.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
227 /// <param name="error">Обработчик ошибки. Данный обработчик получит
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
228 /// исключение возникшее при выполнении операции.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
229 /// <returns>Новое обещание, которое будет выполнено при выполнении исходного обещания.</returns>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
230 public Promise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper, ErrorHandler error) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
231 if (mapper == null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
232 throw new ArgumentNullException("mapper");
2
aa367305156b small fixes
cin
parents: 1
diff changeset
233
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
234 // создаем прицепленное обещание
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
235 Promise<TNew> chained = new Promise<TNew>();
2
aa367305156b small fixes
cin
parents: 1
diff changeset
236
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
237 AddHandler(new ResultHandlerInfo() {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
238 resultHandler = delegate(T result) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
239 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
240 // если преобразование выдаст исключение, то сработает reject сцепленного deferred
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
241 chained.Resolve(mapper(result));
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
242 } catch (Exception e) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
243 chained.Reject(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
244 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
245 },
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
246 errorHandler = delegate(Exception e) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
247 if (error != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
248 error(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
249 // в случае ошибки нужно передать исключение дальше по цепочке
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
250 chained.Reject(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
251 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
252 });
2
aa367305156b small fixes
cin
parents: 1
diff changeset
253
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
254 return chained;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
255 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
256
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
257 public Promise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
258 return Map(mapper, null);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
259 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
260
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
261 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
262 /// Сцепляет несколько аснхронных операций. Указанная асинхронная операция будет вызвана после
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
263 /// выполнения текущей, а результат текущей операции может быть использован для инициализации
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
264 /// новой операции.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
265 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
266 /// <typeparam name="TNew">Тип результата указанной асинхронной операции.</typeparam>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
267 /// <param name="chained">Асинхронная операция, которая должна будет начаться после выполнения текущей.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
268 /// <param name="error">Обработчик ошибки. Данный обработчик получит
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
269 /// исключение возникшее при выполнении текуещй операции.</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
270 /// <returns>Новое обещание, которое будет выполнено по окончанию указанной аснхронной операции.</returns>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
271 public Promise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained, ErrorHandler error) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
272
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
273 // проблема в том, что на момент связывания еще не начата асинхронная операция, поэтому нужно
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
274 // создать посредника, к которому будут подвызяваться следующие обработчики.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
275 // когда будет выполнена реальная асинхронная операция, она обратиться к посреднику, чтобы
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
276 // передать через него результаты работы.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
277 Promise<TNew> medium = new Promise<TNew>();
2
aa367305156b small fixes
cin
parents: 1
diff changeset
278
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
279 AddHandler(new ResultHandlerInfo() {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
280 resultHandler = delegate(T result) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
281 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
282 chained(result).Then(
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
283 x => medium.Resolve(x),
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
284 e => medium.Reject(e)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
285 );
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
286 } catch (Exception e) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
287 // если сцепленное действие выдало исключение вместо обещания, то передаем ошибку по цепочке
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
288 medium.Reject(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
289 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
290 },
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
291 errorHandler = delegate(Exception e) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
292 if (error != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
293 error(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
294 // в случае ошибки нужно передать исключение дальше по цепочке
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
295 medium.Reject(e);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
296 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
297 });
2
aa367305156b small fixes
cin
parents: 1
diff changeset
298
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
299 return medium;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
300 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
301
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
302 public Promise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
303 return Chain(chained, null);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
304 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
305
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
306 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
307 /// Дожидается отложенного обещания и в случае успеха, возвращает
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
308 /// его, результат, в противном случае бросает исключение.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
309 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
310 /// <remarks>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
311 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
312 /// Если ожидание обещания было прервано по таймауту, это не значит,
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
313 /// что обещание было отменено или что-то в этом роде, это только
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
314 /// означает, что мы его не дождались, однако все зарегистрированные
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
315 /// обработчики, как были так остались и они будут вызваны, когда
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
316 /// обещание будет выполнено.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
317 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
318 /// <para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
319 /// Такое поведение вполне оправдано поскольку таймаут может истечь
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
320 /// в тот момент, когда началась обработка цепочки обработчиков, и
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
321 /// к тому же текущее обещание может стоять в цепочке обещаний и его
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
322 /// отклонение может привести к непрогнозируемому результату.
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
323 /// </para>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
324 /// </remarks>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
325 /// <param name="timeout">Время ожидания</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
326 /// <returns>Результат выполнения обещания</returns>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
327 public T Join(int timeout) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
328 ManualResetEvent evt = new ManualResetEvent(false);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
329 Anyway(() => evt.Set());
2
aa367305156b small fixes
cin
parents: 1
diff changeset
330
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
331 if (!evt.WaitOne(timeout, true))
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
332 throw new TimeoutException();
2
aa367305156b small fixes
cin
parents: 1
diff changeset
333
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
334 if (m_error != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
335 throw new TargetInvocationException(m_error);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
336 else
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
337 return m_result;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
338 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
339
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
340 public T Join() {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
341 return Join(Timeout.Infinite);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
342 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
343
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
344 /// <summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
345 /// Данный метод последовательно извлекает обработчики обещания и когда
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
346 /// их больше не осталось - ставит состояние "разрешено".
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
347 /// </summary>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
348 /// <param name="handler">Информация об обработчике</param>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
349 /// <returns>Признак того, что еще остались обработчики в очереди</returns>
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
350 bool FetchNextHandler(out ResultHandlerInfo handler) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
351 handler = default(ResultHandlerInfo);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
352
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
353 lock (this) {
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
354 Debug.Assert(m_state != PromiseState.Unresolved);
2
aa367305156b small fixes
cin
parents: 1
diff changeset
355
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
356 if (m_handlersChain.Count > 0) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
357 handler = m_handlersChain.First.Value;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
358 m_handlersChain.RemoveFirst();
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
359 return true;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
360 } else {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
361 return false;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
362 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
363 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
364 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
365
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
366 void AddHandler(ResultHandlerInfo handler) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
367 bool invokeRequired = false;
2
aa367305156b small fixes
cin
parents: 1
diff changeset
368
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
369 lock (this) {
7
7ea9363fef6c inital progress handling
cin
parents: 6
diff changeset
370 if (m_state == PromiseState.Unresolved)
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
371 m_handlersChain.AddLast(handler);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
372 else
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
373 invokeRequired = true;
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
374 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
375
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
376 // обработчики не должны блокировать сам объект
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
377 if (invokeRequired)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
378 InvokeHandler(handler);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
379 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
380
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
381 void InvokeHandler(ResultHandlerInfo handler) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
382 if (m_error == null) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
383 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
384 if (handler.resultHandler != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
385 handler.resultHandler(m_result);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
386 } catch { }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
387 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
388
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
389 if (m_error != null) {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
390 try {
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
391 if (handler.errorHandler != null)
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
392 handler.errorHandler(m_error);
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
393 } catch { }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
394 }
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
395 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
396
aa367305156b small fixes
cin
parents: 1
diff changeset
397
6
dfa21d507bc5 *refactoring: Promise.Then now returns a new chained promise
cin
parents: 2
diff changeset
398 }
2
aa367305156b small fixes
cin
parents: 1
diff changeset
399 }